One important reason that research on infant cognitive abilities is difficult to conduct is that
a. infants do not have measurable memory skills until 6 months of age, so we cannot assess other cognitive abilities that depend on memory.
b. infants under the age of 3 months are too young to participate in research.
c. it's difficult to assess cognitive processes because of infants' limited motor and language skills.
d. psychologists have typically concentrated on perceptual abilities, rather than cognitive abilities.
Question 2
Psychologists favor the lifespan approach to development because
a. it illustrates that the changes during late adulthood are even more dramatic than the changes during infancy.
b. the research techniques are more valid than when other approaches are used.
c. it demonstrates that the cognitive changes between infancy and old age are relatively minor.
d. it emphasizes that people continue to develop through out their lifetime.
